After an overnight chilling,
cold carcass weight was determined, and sides were
quartered between the 13th rib and the first lumborume to
determine quality and yield grades including marbling score,
lean meat color, fat color, texture, maturity, ribeye area and
backfat thickness. This procedure was done by beef carcass
graders from the Korean Animal Products Grading Service
(APGS, 1995).